Added Feature: MailTextMessage has a new parameter and is able to send attachments now.
dev: you can use the function as before, or give a path as the new last parameter

git-svn-id: file:///Users/Shitiz/Downloads/lssvn/source/limesurvey_dev@7252 b72ed6b6-b9f8-46b5-92b4-906544132732